−2

+3
HT12 HT08

0
3.8" 5.0% t 5.0% t
Design Loads

+5
0.0% c 0.0% c

−20
EDA = 6.0 deg −−−−−−−−−−−−
wing lift 150 lb @ 50 m/s
root bend.mom. 1400 lb−in
root cap load 3300 lb

+20
root cap area 0.037 in^2 top
8.5" 0.030 in^2 bot
cap stress 89 ksi top
110 ksi bot
wrap stress 12 ksi (shear)
root torsion 25 lb−in
root skin th. 0.015 in
wing skin shear 290 psi
0.5 deg

+70
washout
twist Wing spar weights
7.5 deg −−−−−−−−−−−−−−−−−
13" caps 60 g (prepreg uni CF)
core 15 g (6 lb endgrain balsa)
wrap 14 g (2 oz glass)
join 15 g (0.315" CF tube)
tubes 3 g (Kevlar)
boxes 4 g (plywood, glass)
1.0" glue 4 g

Wing structure weights

−−−−−−−−−−−−−−−−−−−−−− AG47ct
core 80 g (2.3 lb Spyderfoam) 5.0% t
2.9 deg skin 90 g (1.7oz Kevlar) 1.7% c
spar 115 g 1.3% c
18" fill 6 g (microballoons+flox) −0.5 deg
webs 6 g (vertical grain balsa)
misc 15 g

Wing panel weights

3.5"
−−−−−−−−−−−−−−−−−− Spyderfoam
center 210 g balsa insert
tips 122 g 2.9 oz CF caps
1.0 oz Kevlar

CF boom
Re sqrt(CL) = 70K 0.59" −> 0.34" ID All−moving tail

5.5"
(85K) 0.016" wall 49 sq in 10.0%
Vh = 0.44
2 layers −17 ... +20 deg
AG46ct

6.8"
6.1% t
Aegea 2m

7.5"
2 layers 2.0% c
1.7% c
Mark Drela 24 May 02 −0.5 deg

Item weights
mass = 21 oz −−−−−−−−−−−−
m/A = 6.2 oz/ft^2 AG45ct
650 NiMH 53 g 6.9% t
area = 490 sq in 4 JR241 36 g
span = 78.6 in 2.2% c
1 HS85MG 24 g
A.R. = 12.6 Hitec 555 23 g 1.8% c
65K wiring 10 g
(80K) Camber Settings
−−−−−−−−−−−−−−−−−−− fuse 78 g AG44ct
Flap Aileron boom 17 g 7.3% t
winch: +20 +20 stab 10 g 2.3% c
zoom : −2 −2 rudd 8 g 1.9% c
run : −2 −2 wing 332 g
1 layer range: 0 0
float: +3 +2
2 layers brake: +70 +10 36 sq in 7.3%
Vv = 0.029
+/−30 deg
1 layer
CF V−strut
50K CF platform/horn Spyder foam
(65K) 4−40 Nylon bolt 1.0 oz Kevlar
Kevlar hinge
Kevlar fuselage shell
1.7oz 4 layers,
CF reinforcements

35K wing +2 deg. tail 0 deg.

(45K)

0 10 20 30 40 in